UserString.MutableString has been removed in Python 3.0.

Works on issue #2877. Thanks Quentin Gallet-Gilles for the patch.

3 files changed, 16 insertions, 2 deletions

diff --git a/Lib/UserString.py b/Lib/UserString.py
index 4ef2265..4460797 100755
--- a/Lib/UserString.py
+++ b/Lib/UserString.py
@@ -146,6 +146,9 @@ class MutableString(UserString, collections.MutableSequence):
 
     A faster and better solution is to rewrite your program using lists."""
     def __init__(self, string=""):
+        from warnings import warnpy3k
+        warnpy3k('the class UserString.MutableString has been removed in '
+                    'Python 3.0', stacklevel=2)
         self.data = string
     def __hash__(self):
         raise TypeError, "unhashable type (it is mutable)"
diff --git a/Lib/test/test_py3kwarn.py b/Lib/test/test_py3kwarn.py
index d023e4b..eed46d1 100644
--- a/Lib/test/test_py3kwarn.py
+++ b/Lib/test/test_py3kwarn.py
@@ -219,6 +219,14 @@ class TestStdlibRemovals(unittest.TestCase):
                 func = getattr(commands, name)
                 self.assertRaises(DeprecationWarning, func, *([None]*arg_count))
 
+    def test_mutablestring_removal(self):
+        # UserString.MutableString has been removed in 3.0.
+        import UserString
+        with catch_warning(record=False):
+            warnings.filterwarnings("error", ".*MutableString",
+                                    DeprecationWarning)
+            self.assertRaises(DeprecationWarning, UserString.MutableString)
+
 
 def test_main():
     with catch_warning(record=True):
diff --git a/Lib/test/test_userstring.py b/Lib/test/test_userstring.py
index 06636fc..cae610e 100755
--- a/Lib/test/test_userstring.py
+++ b/Lib/test/test_userstring.py
@@ -4,8 +4,8 @@
 
 import string
 from test import test_support, string_tests
-
 from UserString import UserString, MutableString
+import warnings
 
 class UserStringTest(
     string_tests.CommonTest,
@@ -135,7 +135,10 @@ class MutableStringTest(UserStringTest):
         self.assertEqual(s, "")
 
 def test_main():
-    test_support.run_unittest(UserStringTest, MutableStringTest)
+    with test_support.catch_warning(record=False):
+        warnings.filterwarnings("ignore", ".*MutableString",
+                                DeprecationWarning)
+        test_support.run_unittest(UserStringTest, MutableStringTest)
 
 if __name__ == "__main__":
     test_main()